: I installed a Moen Positemp in my shower about 5 years ago. Our city water presure is very good and there didn't seem to be much presure through this new faucet. I removed the cartridge and cleaned it several times, I finally got it to work right. About once a year, I would have to remove the cartridge and clean it to get the water preasure back. I done this recently and the cartridge started leaking. I replaced the cartridge and now the new one has no pressure what so ever. I have tried cleaning, greasing, and even changed some of the parts with the old cartridge, but still half the preasure I should have. At one point I was able to get decent presure, but I ran water at the sink when the shower was on and the presure went away and will not ocme back. At this point, I am stumped and wish I have never installed this type of faucet. ive had the same trouble dont know what to try next